JPH07303114A - Packet communication system and its equipment for distributing load - Google Patents
Packet communication system and its equipment for distributing loadInfo
- Publication number
- JPH07303114A JPH07303114A JP9499094A JP9499094A JPH07303114A JP H07303114 A JPH07303114 A JP H07303114A JP 9499094 A JP9499094 A JP 9499094A JP 9499094 A JP9499094 A JP 9499094A JP H07303114 A JPH07303114 A JP H07303114A
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- Prior art keywords
- packet
- congestion
- communication device
- communication
- unit
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- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 230000015654 memory Effects 0.000 claims abstract description 15
- 238000009825 accumulation Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、パケットによる通信を
行なう交換または端末装置間のインタフェースに冗長構
成を持ったパケット通信システムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packet communication system having a redundant structure in an interface between switching or terminal devices for carrying out packet communication.
【０００２】[0002]
【従来の技術】従来のルータ等の機器は、シリアルイン
タフェースが２つの機器間に複数存在している場合、Ｉ
Ｐレイヤ等のレイヤ３にて、宛て先のサブネットワーク
毎に異なるインタフェースを選択するようになってい
る。2. Description of the Related Art A conventional device such as a router has a serial interface if two or more serial interfaces exist between two devices.
In layer 3 such as the P layer, a different interface is selected for each destination sub-network.
【０００３】[0003]
【発明が解決しようとする課題】上述した従来のルータ
等の機器は、シリアルインタフェースが２つの機器間に
複数存在している場合、ＩＰレイヤ等のレイヤ３にて、
宛て先のサブネットワーク毎に異なるインタフェースを
選択するようになっているため、以下の２つの問題点が
ある。The above-mentioned conventional equipment such as a router has a layer 3 such as an IP layer when a plurality of serial interfaces exist between two equipment.
Since different interfaces are selected for each destination sub-network, there are the following two problems.
【０００４】（１）パケットの振り分けが宛て先のサブ
ネットワーク毎、または特開平０２−２２２３４０のよ
うに呼毎であるため、相手先の輻輳状況によらず、静的
な負荷分散しかできない。（２）宛て先の振り分けがそ
のコネクションのトラヒックとは全く関係なく行なわれ
るため、特定の回線に負荷が集中してしまう可能性があ
る。(1) Since packets are distributed for each destination sub-network or for each call as in JP-A-02-222340, only static load distribution can be performed irrespective of the congestion situation of the other party. (2) Since the destinations are distributed regardless of the traffic of the connection, the load may be concentrated on a specific line.
【０００５】本発明は上記問題点を解決したパケット通
信システムおよびそれに用いられる通信装置を提供する
ことを目的とする。An object of the present invention is to provide a packet communication system and a communication device used for the same which solve the above problems.
【０００６】[0006]
【課題を解決するための手段】本発明のパケット通信シ
ステムは、通信装置間の通信路として、通信装置間が複
数の回線で接続され、どの回線を使用しても通信装置間
の通信が保証されるような通信装置間インタフェースを
有し、通信装置内部からの送信パケットを、複数の回線
に振り分けるパケット送信部と、複数の回線から受信し
たパケットを、多重した後に通信装置内部に送信するパ
ケット受信部とを有するパケット通信システムにおい
て、前記各通信装置のパケット受信部は、受信パケット
を蓄積するバッファメモリ内の蓄積パケット数をモニタ
するパケット蓄積カウンタと、パケット蓄積カウンタの
値とバッファメモリ容量との比較から装置内部の輻輳状
態を認識し、これをパケット送信部に通知する自局輻輳
状態通知手段を有し、前記各通信装置のパケット送信部
は、パケットに設けられた輻輳通知領域に、パケット受
信部の輻輳状態を明示的に示す輻輳状態明示手段を有
し、また、前記パケット受信部は、受信したパケット上
に定義された輻輳通知領域を見て相手側通信装置の輻輳
状態を各回線毎に認識し、その結果をパケット送信部に
通知する相手局輻輳状態通知手段を有し、さらに、前記
パケット送信部は、パケット受信部からの、相手側通信
装置のパケット輻輳通知に従って、送信すべきパケット
をどの回線に出力したら良いか、または送信を規制する
信号を装置内部のバッファメモリ制御部へ通知すべきか
を選択する選択手段を有し、加えて前記各通信装置は、
相手側通信装置が輻輳時に、前記パケット送信部へのパ
ケットの出力を控えさせるパケット負荷分散制御部を有
する。In the packet communication system of the present invention, as a communication path between communication devices, the communication devices are connected by a plurality of lines, and the communication between the communication devices is guaranteed no matter which line is used. A packet transmission unit having an inter-communication device interface as described above, which distributes a transmission packet from inside the communication device to a plurality of lines, and a packet which is transmitted to the inside of the communication device after multiplexing packets received from the plurality of lines. In a packet communication system having a receiving unit, the packet receiving unit of each of the communication devices includes a packet accumulation counter for monitoring the number of accumulated packets in a buffer memory for accumulating received packets, a value of the packet accumulation counter, and a buffer memory capacity. It has its own station congestion status notification means that recognizes the internal congestion status from the comparison of the above and notifies the packet transmission section of this. The packet transmitting unit of each of the communication devices, in the congestion notification area provided in the packet, has a congestion state indicating means that explicitly indicates the congestion state of the packet receiving unit, and the packet receiving unit, the received packet The congestion notification area defined above is used to recognize the congestion status of the communication device on the other side for each line, and the remote station has a congestion status notification means for notifying the result to the packet transmission unit, and further, the packet transmission Section should output the packet to be transmitted to which line according to the packet congestion notification from the other side communication device from the packet receiving unit, or should it notify the buffer memory control unit inside the device of the signal to restrict the transmission? In addition to each of the communication devices,
The other communication device has a packet load distribution control unit that refrains from outputting packets to the packet transmission unit when congestion occurs.
【０００７】[0007]
【作用】自局輻輳状態通知手段は、パケット受信部の輻
輳状況をパケット蓄積カウンタの内容から判断し、輻輳
時にパケット送信部にその旨を通知し、パケット送信部
はこの通知を受け、輻輳状態明示手段により送信パケッ
トの輻輳通知領域に輻輳を示す情報を書き込み、特定の
回線に負荷が集中しないようにトラヒックの負荷分散を
相手側通信装置に要求する。The local congestion status notifying means judges the congestion status of the packet receiving unit from the contents of the packet accumulation counter, and when the congestion occurs, notifies the packet transmitting unit to that effect, and the packet transmitting unit receives this notification and confirms the congestion status. Information indicating congestion is written in the congestion notification area of the transmission packet by the explicit means, and the other communication device is requested to distribute the load of traffic so that the load is not concentrated on a specific line.
【０００８】また、パケット受信部の相手局輻輳状態通
知手段は、相手側のパケット送信部によりパケット上に
書き込まれた輻輳通知情報を検知し、輻輳した回線を回
避して、同じ宛て先の装置へ向かう他の回線にパケット
を送出させることにより、パケットの振り分けを、相手
先の輻輳状況に応じて行なう。しかし、同一の宛て先に
向かう全ての回線が混雑している場合には、パケット負
荷分散制御部が通信装置内部に送信規制信号を送信し、
パケット送信部からのパケットの送出を一時的に止め
る。[0008] Further, the partner station congestion state notifying means of the packet receiving unit detects the congestion notification information written on the packet by the packet transmitting unit of the partner side, avoids the congested line, and sends the device to the same destination. The packets are distributed according to the congestion status of the other party by sending the packets to the other line toward the destination. However, when all the lines destined for the same destination are congested, the packet load balancing control unit sends a transmission restriction signal inside the communication device,
Temporarily stop sending packets from the packet transmitter.
【０００９】このようにして、通信装置の輻輳状態に応
じてフレキシブルに情報通信機器のシリアルインタフェ
ース上のパケットの負荷分散が行なえるとともに、輻輳
によるパケットの廃棄をネットワークレベルで押え、か
つネットワークのスループットを上げることを可能にし
ている。In this way, the load of packets on the serial interface of the information communication equipment can be flexibly distributed according to the congestion state of the communication device, the packet discard due to the congestion can be suppressed at the network level, and the network throughput can be improved. It is possible to raise.
【００１０】[0010]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。図１は本発明の負荷分散を行なうパケット
通信システムを示すブロック図、図２は図１の実施例に
用いられる通信装置の入出力端部を詳細に示すブロック
図である。通信装置１１，１２，１３，１４は、交換装
置または端末装置であって、ネットワークを構成するた
めに装置間が複数の双方向のリンクでそれぞれ接続さ
れ、通信装置間のトラヒックの負荷分散が図れる構成と
なっている。Embodiments of the present invention will now be described with reference to the drawings. 1 is a block diagram showing a packet communication system for performing load distribution according to the present invention, and FIG. 2 is a block diagram showing in detail an input / output terminal of a communication device used in the embodiment of FIG. The communication devices 11, 12, 13, and 14 are switching devices or terminal devices, and the devices are connected to each other by a plurality of bidirectional links to form a network, and the load distribution of traffic among the communication devices can be achieved. It is composed.
【００１１】通信装置１１，１２，１３，１４の各入出
力端部は、図２に示すような同一形式のパケット送信部
１０とパケット受信部２０とから構成されている。すな
わち、伝送路１０２ａ，１０２ｂよりそれぞれパケット
受信部２０に入力されたパケットは、パケット受信処理
部４ａ，４ｂにそれぞれ入力され、有為パケットだと識
別された後にバッファメモリ３ａ，３ｂに入力される。
このとき、パケット受信処理部４ａ，４ｂはパケットの
受信を制御線１０８ａ，１０８ｂを介してバッファメモ
リ中のパケット蓄積数カウンタ５ａ，５ｂ（別体として
設けてもよい）に通知する（例えば、カウントアップす
る）。Each of the input / output terminals of the communication devices 11, 12, 13 and 14 is composed of a packet transmitter 10 and a packet receiver 20 of the same type as shown in FIG. That is, the packets input to the packet receiving unit 20 through the transmission paths 102a and 102b are input to the packet reception processing units 4a and 4b, respectively, and are identified as significant packets, and then input to the buffer memories 3a and 3b. .
At this time, the packet reception processing units 4a and 4b notify the reception of packets to the packet accumulation number counters 5a and 5b (may be provided separately) in the buffer memory via the control lines 108a and 108b (for example, counting). Up).
【００１２】一方、パケット読出制御部６ａ，６ｂは、
バッファメモリ３ａ，３ｂに蓄積されたパケットの読み
出しを交互に行い、通信路１０６ａ，１０６ｂに出力す
るとともに、パケットの読み出しを制御線１０７ａ，１
０７ｂを介して先のカウンタ５ａ，５ｂに通知する（例
えば、カウントダウンする）。セレクタ８は通信路１０
６ａ，１０６ｂから来たパケットを多重し、通信路１０
４を介して通信装置内部に送信する。On the other hand, the packet read control units 6a and 6b are
The packets accumulated in the buffer memories 3a and 3b are alternately read and output to the communication paths 106a and 106b, and the packets are read from the control lines 107a and 1b.
The counters 5a and 5b are notified (for example, count down) via 07b. Selector 8 is communication path 10
6a and 106b are multiplexed and the communication path 10
4 to the inside of the communication device.
【００１３】カウンタ５ａ，５ｂはバッファメモリ３
ａ，３ｂ内のパケット数を管理しているが、この数が一
定値を越えると、パケットのオーバーフローの警告信号
を制御線１１０ａ，１１０ｂを介してパケット送信部１
０の輻輳通知制御部１ａ，１ｂに通知する。輻輳通知制
御部１ａ，１ｂは、パケットに設けられた輻輳通知領域
に輻輳が生じたことを明示的に書き込む。このパケット
が、伝送路１０１ａ，１０１ｂを通ってパケットの輻輳
を引き起こした相手側通信装置に転送されることによ
り、相手側通信装置は自身の送信パケットにより輻輳が
生じていることを知る。ここでのパケットの輻輳通知領
域は、ネットワーク内で矛盾の内容に予め定義されてい
る前提であり、ネットワーク内で使用するプロトコルに
影響がなければどの領域をアサインしても構わない。The counters 5a and 5b are buffer memories 3
Although the number of packets in a and 3b is managed, if this number exceeds a certain value, a packet overflow warning signal is sent via the control lines 110a and 110b.
Notify the congestion notification control units 1a and 1b of 0. The congestion notification control units 1a and 1b explicitly write that congestion has occurred in the congestion notification area provided in the packet. This packet is transferred to the other communication device that has caused the packet congestion through the transmission paths 101a and 101b, so that the other communication device knows that the transmission packet of the other device causes the congestion. The congestion notification area of the packet here is pre-defined as a content of contradiction in the network, and any area may be assigned as long as it does not affect the protocol used in the network.
【００１４】上述のようにパケットに明示的に記された
輻輳通知は、パケットの受信側の通信装置のパケット受
信処理部４ａ，４ｂにより検出され、相手側の輻輳状態
を制御線１０９ａ，１０９ｂにより対向装置状態管理部
７がこれを認識し、パケット送信部のセレクタ２を制御
線１１１を介して制御する。セレクタ２は、制御線１１
１が示すリンクの輻輳状態を参照して、通信路１０３を
介して装置内部から受信するパケットを、通信路１０５
ａ，１０５ｂのどちらに出力したら良いかを選択する。
両方のリンク（それ以上のリンクがあった場合には、い
ずれのリンクも）がともに輻輳している場合は、装置内
部からのパケットの送信を規制するために制御線１１２
の規制信号をアクティブにする。The congestion notification explicitly described in the packet as described above is detected by the packet reception processing units 4a and 4b of the communication device on the receiving side of the packet, and the congestion state of the other side is controlled by the control lines 109a and 109b. The opposite device state management unit 7 recognizes this and controls the selector 2 of the packet transmission unit via the control line 111. The selector 2 has a control line 11
The packet received from the inside of the device via the communication path 103 is referred to by the communication path 105 by referring to the congestion state of the link indicated by 1.
It is selected which of a and 105b should be output.
If both links (and if there are more links, both links) are congested together, the control line 112 controls the transmission of packets from inside the device.
Activate the regulatory signal of.
【００１５】以上の構成によることにより、通信装置間
の複数のリンクを用いて負荷分担が行なえるとともに、
相手装置の輻輳状態によりパケットの送信規制を行な
い、ネットワーク全体での輻輳によるパケットの廃棄を
最小限に押さえ、かつネットワークのスループットを上
げることが可能となる。With the above configuration, the load can be shared by using a plurality of links between the communication devices, and
It is possible to regulate packet transmission depending on the congestion state of the partner device, minimize packet discard due to congestion in the entire network, and increase network throughput.
【００１６】[0016]
【発明の効果】以上説明したように本発明は、通信装置
間を複数の回線で接続し、回線の輻輳状態に応じて負荷
分散を行なうとともに、ネットワーク全体での輻輳によ
るパケットの廃棄を最小限に押さえ、かつネットワーク
のスループットを上げることを可能にできる効果があ
る。As described above, according to the present invention, communication devices are connected by a plurality of lines, load distribution is performed according to the congestion state of the lines, and packet discard due to congestion in the entire network is minimized. It is possible to suppress the above and increase the throughput of the network.
【図１】本発明の負荷分散を行なうパケット通信システ
ムの一実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of a packet communication system that performs load distribution according to the present invention.
【図２】図１の実施例に用いられる通信装置の入出力端
部を詳細に示すブロック図である。FIG. 2 is a block diagram showing in detail an input / output end of a communication device used in the embodiment of FIG.
１１，１２，１３，１４ 通信装置 １ａ，１ｂ 輻輳通知制御部 ２ セレクタ ３ａ，３ｂ バッファメモリ ４ａ，４ｂ パケット受信処理部 ５ａ，５ｂ パケット蓄積数カウンタ ６ａ，６ｂ パケット読出制御部 ７ 対向装置状態管理部 ８ セレクタ １０１ａ，１０１ｂ 伝送路 １０２ａ，１０２ｂ 伝送路 １０３，１０４，１０５ａ，１０５ｂ，１０６ａ，１０
６ｂ 通信路 １０７ａ，１０７ｂ パケット読出通知用の制御線 １０８ａ，１０８ｂ パケット受信通知用の制御線 １０９ａ，１０９ｂ 相手側輻輳状態通知用の制御線 １１０ａ，１１０ｂ パケットオーバーフロー警告用
の制御線 １１１ セレクタ用の制御線 １１２ パケット送信規制用の制御線11, 12, 13, 14 Communication device 1a, 1b Congestion notification control unit 2 Selector 3a, 3b Buffer memory 4a, 4b Packet reception processing unit 5a, 5b Packet accumulation counter 6a, 6b Packet read control unit 7 Opposite device state management unit 8 selectors 101a, 101b transmission lines 102a, 102b transmission lines 103, 104, 105a, 105b, 106a, 10
6b Communication path 107a, 107b Control line for packet read notification 108a, 108b Control line for packet reception notification 109a, 109b Control line for partner side congestion state notification 110a, 110b Control line for packet overflow warning 111 Control for selector Line 112 Control line for controlling packet transmission
Claims (2)
が複数の回線で接続され、どの回線を使用しても通信装
置間の通信が保証されるような通信装置間インタフェー
スを有し、通信装置内部からの送信パケットを、複数の
回線に振り分けるパケット送信部と、複数の回線から受
信したパケットを、多重した後に通信装置内部に送信す
るパケット受信部とを有するパケット通信システムにお
いて、 前記各通信装置のパケット受信部は、受信パケットを蓄
積するバッファメモリ内の蓄積パケット数をモニタする
パケット蓄積カウンタと、パケット蓄積カウンタの値と
バッファメモリ容量との比較から装置内部の輻輳状態を
認識し、これをパケット送信部に通知する自局輻輳状態
通知手段を有し、 前記各通信装置のパケット送信部は、パケットに設けら
れた輻輳通知領域に、パケット受信部の輻輳状態を明示
的に示す輻輳状態明示手段を有し、 また、前記パケット受信部は、受信したパケット上に定
義された輻輳通知領域を見て相手側通信装置の輻輳状態
を各回線毎に認識し、その結果をパケット送信部に通知
する相手局輻輳状態通知手段を有し、 さらに、前記パケット送信部は、パケット受信部から
の、相手側通信装置のパケット輻輳通知に従って、送信
すべきパケットをどの回線に出力したら良いか、または
送信を規制する信号を装置内部のバッファメモリ制御部
へ通知すべきかを選択する選択手段を有し、 加えて前記各通信装置は、相手側通信装置が輻輳時に、
前記パケット送信部へのパケットの出力を控えさせるパ
ケット負荷分散制御部を有することを特徴とするパケッ
ト通信システム。1. An inter-communication device interface is provided as a communication path between communication devices, wherein the communication devices are connected by a plurality of lines and communication between the communication devices is guaranteed regardless of which line is used. In a packet communication system having a packet transmission unit that distributes a transmission packet from the inside of the communication device to a plurality of lines, and a packet reception unit that multiplexes the packets received from the plurality of lines and then transmits the packets to the inside of the communication device, The packet receiving unit of the communication device recognizes the congestion state inside the device from a packet accumulation counter that monitors the number of accumulated packets in the buffer memory that accumulates received packets, and a comparison between the value of the packet accumulation counter and the buffer memory capacity. It has its own station congestion state notification means for notifying this to the packet transmission unit, and the packet transmission unit of each communication device The congestion notification area is provided with a congestion state indicating means that explicitly indicates the congestion state of the packet receiving section, and the packet receiving section is a partner that looks at the congestion notification area defined on the received packet. The congestion state of the side communication device is recognized for each line, and has a partner station congestion state notification means for notifying the result to the packet transmission unit, and further, the packet transmission unit, from the packet reception unit, the other side communication According to the packet congestion notification of the device, it has a selection means for selecting to which line a packet to be transmitted should be output, or a signal for restricting the transmission should be notified to the buffer memory control unit inside the device. Each communication device, when the other communication device is congested,
A packet communication system comprising: a packet load balancing control unit that refrains from outputting packets to the packet transmission unit.
が複数の回線で接続され、どの回線を使用しても通信装
置間の通信が保証されるような通信装置間インタフェー
スを有し、通信装置内部からの送信パケットを、複数の
回線に振り分けるパケット送信部と、複数の回線から受
信したパケットを、多重した後に通信装置内部に送信す
るパケット受信部とを有するパケット通信システムに用
いられる前記通信装置であって、 前記各通信装置のパケット受信部は、受信パケットを蓄
積するバッファメモリ内の蓄積パケット数をモニタする
パケット蓄積カウンタと、パケット蓄積カウンタの値と
バッファメモリ容量との比較から装置内部の輻輳状態を
認識し、これをパケット送信部に通知する自局輻輳状態
通知手段を有し、 前記各通信装置のパケット送信部は、パケットに設けら
れた輻輳通知領域に、パケット受信部の輻輳状態を明示
的に示す輻輳状態明示手段を有し、 また、前記パケット受信部は、受信したパケット上に定
義された輻輳通知領域を見て相手側通信装置の輻輳状態
を各回線毎に認識し、その結果をパケット送信部に通知
する相手局輻輳状態通知手段を有し、 さらに、前記パケット送信部は、パケット受信部から
の、相手側通信装置のパケット輻輳通知に従って、送信
すべきパケットをどの回線に出力したら良いか、または
送信を規制する信号を装置内部のバッファメモリ制御部
へ通知すべきかを選択する選択手段を有し、 加えて前記各通信装置は、相手側通信装置が輻輳時に、
前記パケット送信部へのパケットの出力を控えさせるパ
ケット負荷分散制御部を有する通信装置。2. An inter-communication device interface is provided as a communication path between the communication devices, wherein the communication devices are connected by a plurality of lines and communication between the communication devices is guaranteed regardless of which line is used. Used in a packet communication system having a packet transmitting unit that distributes a transmission packet from the inside of the communication device to a plurality of lines, and a packet receiving unit that multiplexes the packets received from the plurality of lines and then transmits the packet to the inside of the communication device. A communication device, wherein the packet receiving unit of each communication device is a device that compares a packet accumulation counter that monitors the number of accumulated packets in a buffer memory that accumulates received packets, and the value of the packet accumulation counter with the buffer memory capacity. Recognizing the internal congestion state, and having a local station congestion state notifying means for notifying this to the packet transmission unit, the packet of each communication device The packet transmitting unit has a congestion state indicating means for explicitly indicating the congestion state of the packet receiving unit in the congestion notification area provided in the packet, and the packet receiving unit is defined on the received packet. The congestion notification area is recognized for each line by recognizing the congestion status of the communication device on the other side, and the other party has a congestion status notification means for notifying the result to the packet transmission unit, and the packet transmission unit is a packet reception unit. Selecting means for selecting to which line a packet to be transmitted should be output, or a signal for restricting transmission should be notified to a buffer memory control unit inside the device according to the packet congestion notification of the communication device from the other side. In addition, each of the communication devices, when the other communication device is congested,
A communication device having a packet load balancing control unit that refrains from outputting packets to the packet transmission unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9499094A JP2616431B2 (en) | 1994-05-09 | 1994-05-09 | Packet communication system and apparatus for load balancing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9499094A JP2616431B2 (en) | 1994-05-09 | 1994-05-09 | Packet communication system and apparatus for load balancing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07303114A true JPH07303114A (en) | 1995-11-14 |
| JP2616431B2 JP2616431B2 (en) | 1997-06-04 |
Family
ID=14125324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9499094A Expired - Fee Related JP2616431B2 (en) | 1994-05-09 | 1994-05-09 | Packet communication system and apparatus for load balancing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616431B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005354183A (en) * | 2004-06-08 | 2005-12-22 | Fujitsu Ltd | Network equipment |
| JP2012186570A (en) * | 2011-03-03 | 2012-09-27 | Fujitsu Ltd | Relay station and relay method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02192246A (en) * | 1988-10-28 | 1990-07-30 | Oki Electric Ind Co Ltd | Routing method and node circuit for burst data transfer |
| JPH02209044A (en) * | 1989-02-09 | 1990-08-20 | Nippon Telegr & Teleph Corp <Ntt> | Exchange |
| JPH02257737A (en) * | 1989-03-30 | 1990-10-18 | Toshiba Corp | Congestion control system in packet exchange network |
| JPH03175843A (en) * | 1989-12-05 | 1991-07-30 | Fujitsu Ltd | Intra-node congestion information system |
-
1994
- 1994-05-09 JP JP9499094A patent/JP2616431B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02192246A (en) * | 1988-10-28 | 1990-07-30 | Oki Electric Ind Co Ltd | Routing method and node circuit for burst data transfer |
| JPH02209044A (en) * | 1989-02-09 | 1990-08-20 | Nippon Telegr & Teleph Corp <Ntt> | Exchange |
| JPH02257737A (en) * | 1989-03-30 | 1990-10-18 | Toshiba Corp | Congestion control system in packet exchange network |
| JPH03175843A (en) * | 1989-12-05 | 1991-07-30 | Fujitsu Ltd | Intra-node congestion information system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005354183A (en) * | 2004-06-08 | 2005-12-22 | Fujitsu Ltd | Network equipment |
| JP4500589B2 (en) * | 2004-06-08 | 2010-07-14 | 富士通株式会社 | Network equipment |
| JP2012186570A (en) * | 2011-03-03 | 2012-09-27 | Fujitsu Ltd | Relay station and relay method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616431B2 (en) | 1997-06-04 |
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